According to a report by Citi, the net inflows into ether ETFs over six months could range from $4.7 billion to $5.4 billion. However, the bank suggests that these inflows and the beta of ether returns may be lower than expected due to the lack of diversification benefits and the perception of bitcoin and ether as similar assets. Additionally, the report notes that the lack of staking in ether spot ETFs could also impact the expected flows.